JPH0743408Y2 - Latch with switch - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to an improvement of a latch with a switch.

[Prior Art] Conventionally, regarding this type of switch-equipped latch, the applicant has described in the specification and drawings attached to the application of Japanese Patent Application No. 1-150554 that a pair of terminals are provided on a fixed cylinder and a sliding body. It has already been proposed to provide the two terminals so that they are electrically connected at the retracted position of the sliding body and are electrically disconnected at the advanced position of the sliding body.

[Problems to be Solved by the Invention] However, in the latch previously proposed by the present applicant, there is a problem that only the opening / closing operation of the circuit can be performed by the forward / backward movement of the sliding body, and the switching operation of the circuit cannot be performed. .

For example, if it is used to turn on / off one light bulb, it is sufficient to connect the two terminals of the latch previously proposed by the present applicant in the circuit.

However, when switching two or more light bulbs to be turned on and off, it is not enough to connect the latch in the circuit, and a relay or the like is additionally required. For this reason, not only is circuit wiring troublesome, but there are also major disadvantages in terms of cost and space for relays and the like.

Therefore, the present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a latch with a switch capable of switching a circuit.

[Means for Solving the Problems] The present invention is for achieving the above object, and the contents thereof will be described below with reference to the embodiments shown in the drawings.

According to the present invention, three fixed contacts (110 to 130) insulated from each other are provided in a fixed cylinder (20) along a sliding surface with a sliding body (30), and the sliding body has the above-mentioned three Of the two fixed contacts, a common contact portion (141) that is always connected to one fixed contact (for example, the common fixed contact 110), and is connected to this common contact portion and remains at the forward and backward positions of the sliding body. A switching contact portion (for example, the first and second switching contact portions 142, 14) that selectively conducts to two fixed contacts (for example, the first and second switching fixed contacts 120, 130).
3) is provided with a movable contact (140) provided with.

[Operation] Therefore, according to the present invention, in the forward position of the sliding body (30), as shown in FIG.
The common contact part (141) of (0) conducts to one fixed contact (for example, the common fixed contact 110) provided in the fixed cylinder,
The switching contact portion (for example, the first switching contact portion 142) has one of the two remaining fixed contacts in the fixed cylinder (for example, the first switching contact portion 142).
The two fixed contacts (110,1) are connected to the switching fixed contact 120).
20) conducts through the movable contact.

At this time, the switching contact portion of the movable contact of the sliding body (for example, the second contact
The switching contact portion 143) is in a non-conductive state with respect to the other of the two fixed contacts (for example, the second switching fixed contact 130).

On the other hand, in the retracted position of the sliding body, as shown in FIG. 9, the common contact portion (141) of the movable contact maintains the conduction state with respect to one fixed contact (110) in the fixed cylinder. The switching contact part (143) is electrically connected to the other (130) of the two remaining fixed contacts in the fixed cylinder, and the two fixed contacts (110, 130) are electrically connected via the movable contact.

At this time, the switching contact portion (142) of the movable contact of the sliding body is
One of the two fixed contacts (120) is in a non-conductive state.

[Embodiment] First, the latch of the present embodiment uses a heart-shaped cam groove, and the basic structure and operation are the same as the latch of the present invention, except for the switch mechanism. 61-163
It can be said that it is almost the same as what is described in the 870 publication.

Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the drawings.

Fig. 1 is an exploded perspective view, Figs. 2 and 3 show the latch in an assembled state, Fig. 2 is a plan view of the latch and strike in the unlocked state, and Fig. 3 is the same as the strike contacting the latch. FIG. 4 is a vertical cross-sectional view showing the latched state, FIG. 4 is a rear view of the fixed cylinder of the latch, and FIG. 5 is a plan view of the sliding body of the latch.

In the figure, reference numeral 10 denotes a latch. First, as explained from the basic parts of the latch 10, as shown in FIG. 1, a substantially rectangular tubular hollow fixing member having a front side opening laterally and the other end rear side closed. Cylinder 20
And slidably held in this fixed cylinder 20,
And a sliding body 30 which comes in and out from the opening front surface 21 of 20. Both of them are molded as insulating materials, for example, plastics having appropriate elasticity and rigidity.

As shown in FIG. 3, a metal coil spring 40 as a spring means is housed in the fixed cylinder 20. The spring 40 is provided between the inner surface of the rear wall 22 of the fixed cylinder 20 and the sliding body 30. The sliding body 30 is constantly urged toward the opening front surface 21 of the fixed barrel 20 by elastically contracting with.

Further, a heart-shaped cam groove 5050 is engraved on the upper surface of the sliding body 30, and the other end tip portion of the lock lever 60 whose one end is axially fixed to the fixed barrel 20 is inserted into the cam groove 50, This lock lever
By tracing the cam groove 50 of the sliding body 30 at the tip portion of 60, the sliding body 30 is resisted against the biasing force of the spring 40,
The fixed cylinder 20 is locked at two positions, a forward position slightly protruding from the opening front surface 21 and a retracted position stored in the fixed cylinder 20.

As shown in FIG. 5, the cam groove 50 is engraved around the heart island 51, and by utilizing the height difference of the bottom, the lock lever 60 follows the cam groove 50, and the heart island 51. Unidirectionally.

Specifically, the cam groove 50 extends long from the pointed tip portion 51a of the heart island 51 toward the rear end portion of the sliding body 30, and is continuous with the start end portion 52 having a deep dead end and the start end portion 52. Further, an outward path 53 that gradually becomes shallower along one side of the heart island 51, and a short-deep end 54 that extends from the shallowest end 53 ′ of the outward path 53 toward the tip of the sliding body 30. , This end 54
And a half-circumference is surrounded by the heart-shaped recess 51b of the heart island 51, and is slightly deeper than the terminal end 54, and adjacent to the stopper 55, and toward the tip of the sliding body 30. Escape to the other side of Heart Island 51, which extends short and is slightly deeper than stop 55
56, and a return path 57 along the other side of the heart island 51 from the escape portion 56, which is gradually shallower and communicates with the shallowest end 57 'in the middle of the starting end portion 52.

As shown in FIG. 1, the lock lever 60 is a wire made of metal, and is formed by bending both ends of the lock lever 60 downward in the same direction. Then, the bent one end of the lock lever 60 is inserted into the bearing portion 23 formed on the rear wall 22 of the fixed barrel 20, and
The tip of the other end is inserted into the cam groove 50. Therefore, the lock lever 60 swings left and right around the bearing portion 23 while following the cam groove 50, and due to the difference in height of the bottom of the cam groove 50,
It slightly moves up and down with respect to the bearing portion 23.

In order to prevent the lock lever 60 from being lifted from the cam groove 50 in relation to the vertical movement of the lock lever 60, the first
As shown in the figure, a side U-shaped presser spring 70 is used.
Then, on the upper surface of the rear portion of the fixed barrel 20, a square-shaped window portion 25 facing the lock lever 60 is formed, while the pressing spring 70 is
As shown in FIGS. 2 and 3, the spring is applied to the rear portion of the fixed barrel 20 and the lock lever 60 is inserted through the window portion 25.
A spring force is applied to the lock lever 60 to constantly urge the lock lever 60 toward the bottom of the cam groove 50.

On the other hand, in FIGS. 2 and 3, reference numeral 80 denotes a mounting panel having a mounting hole 81 for the latch 10, 90 denotes a strike position facing the mounting hole 81 of the mounting panel 81, and a strike contacting with and separating from the mounting panel 81. Show.

The mounting hole 81 of the mounting panel 81 is formed in a square shape which is slightly larger than the outer surface of the fixed cylinder 20 of the latch 10.

On the other hand, the fixed cylinder 20 of the latch 10 has a mounting hole 81 at its opening end in consideration of the mountability of the mounting panel 81 to the mounting hole 81.
A collar 24 that is one size larger is formed, and the collar 24
A pair of left and right elastic claws 25, 25 facing each other on the rear surface are formed.

Therefore, finally, the fixed cylinder 20 of the latch 10 in the assembled state may be aligned with the mounting hole 81 of the mounting panel 81 and inserted backward.

That is, when the fixed cylinder 20 of the latch 10 is inserted in alignment with the mounting hole 81, both elastic claws 25 contact the inner edge of the mounting hole 81.
When the fixed cylinder 20 is strongly pushed in by this, both elastic claws 25 are pushed by the inner edge of the mounting hole 81 and bent into the fixed cylinder 20,
Pass through the mounting hole 81. Then, when both elastic claws 25 of the fixed cylinder 20 pass through the mounting hole 81, both elastic claws 25 are elastically restored by the resin.
Is restored and the mounting panel 81 is sandwiched from the front and back with the rear surface of the collar portion 24, so that the fixed cylinder 20 is attached to the mounting hole 81 of the mounting panel 81.
Install inside.

As shown in FIGS. 2 and 3, the strike 90 extends substantially horizontally from the rear surface of the component 100 facing the mounting panel 81, and a wedge-shaped protruding projection 91 is formed on the lower surface of the tip thereof. .

On the other hand, the sliding body 30 includes a frame-shaped main body portion 31 having the cam groove 50 on the upper surface and a holding portion 32 extending obliquely forward from the lower surface of the main body portion 31, and the tip end upper surface of the holding portion 32 is provided. Is a wedge-shaped locking claw 33 that engages with the engaging claw 91 of the strike 90.
To form. The holding portion 32 hangs obliquely downward from the lower edge of the opening front surface 21 of the fixed barrel 20, and when the sliding body 30 retracts into the fixed barrel 20, is pushed by the lower edge of the opening front face 21 of the fixed barrel 20,
The strike 90 is bent upward, and the strike 90 is sandwiched between the upper surface and the lower surface of the main body 31 from above and below.

On the other hand, the guide means of the spring 40 will be explained.
As shown in FIG. 3, on the inner surface of the rear wall 22 of the boss 20, a boss 27 that is inserted into the ring at one end of the spring 40 is provided.
Stand upright. On the other hand, on the lower surface of the main body 31 of the sliding body 30, a U-shaped frame-shaped guide frame 34 having an open rear surface into which the other end of the spring 40 is fitted is provided. Therefore, the spring 40 elastically contracts between the inner surface of the rear wall 22 of the fixed cylinder 20 having the boss 27 and the rearward rear surface of the guide frame 34 of the sliding body 30.

First, the operation of the latch 10 up to this point will be described with reference to FIGS. 6 and 7. FIGS. 6 and 7 show the locked state of the latch, and FIG. 6 is a plan view of the latch and strike. , 7th
The figures show the same longitudinal sectional views, respectively.

First, the latch 10 in the assembled state, as shown in FIGS. 2 and 3,
The sliding body 30 is at the forward position slightly protruding from the opening front surface 21 of the fixed barrel 20.

That is, at this time, the tip of the lock lever 60 is
It stops at the starting end 52 of the spring 50 and receives the restoring force of the spring 40. For this reason, the sliding body 30 is located in front of the opening of the fixed barrel 20.
Although it is in a forward position slightly protruding from 21, it does not come out from the front opening 21 of the fixed barrel 20.

Then, attach the rear surface of the component 100 of the strike 90 to the mounting panel 8
When you approach the front of 1, the tip of strike 90 slides
It hits the front face of the guide frame 34 of 0.

When the strike 90 is pushed into the fixed cylinder 20 with this, the sliding body 30 is pushed by the strike 90 and the spring 40
Retreat against the spring force of.

At this time, as shown in FIG. 7, the holding portion 32 extending obliquely downward of the sliding body 30 is pushed by the lower edge of the opening front surface 21 of the fixed barrel 20 and bends upward, and its upper surface and the main body portion. The strike 90 is sandwiched between the lower surface of the strike 31 and the lower surface of the strike 31, and the locking claw 33 is engaged with the engaging claw 91 of the strike 90 from below.

At this time, the tip of the lock lever 60 moves from the starting end 52 to the forward path 53 due to the displacement of the cam groove 50 as the sliding body 30 retracts.
Proceed to.

That is, the starting end portion 52 of the cam groove 50 is branched before the outward path 53, and the shallowest end 57 ′ of the returning path 57 faces, but the shallowest end 57 ′ is one step higher than the bottom of the starting end portion 52. Therefore, the tip end portion of the lock lever 60 does not proceed to the return path 57 but advances to the outward path 53 where the depth becomes gradually shallow.

Then, as the sliding body 30 retreats, the tip end portion of the lock lever 60 advances along the outward path 53, further advances from the shallowest end 53 ′ thereof to a slightly deeper end portion 54, and the end portion 54 is a dead end. Therefore, the sliding body 30 cannot be pushed in any more by hitting its tip. This position is a position slightly beyond the retracted position of the sliding body 30.

When the force pushing the strike 90 is released, the sliding body 30 is pushed back by the restoring force of the spring accumulated in the spring 40. By the forward movement of the sliding body 30 at that time,
The front end of the lock lever 60 moves backward in the rear end 54.

The forward end of the lock lever 60, which has moved backward, advances to the stop 55 adjacent to the terminal end 54.

That is, since the shallowest end 53 ′ of the outward path 53 is one step higher than the terminal end portion 54, the tip end portion of the lock lever 60 is
It cannot return to the outward route 53 and falls into the stop portion 55 deeper than the terminal end portion 54.

At this point, the tip of the lock lever 60 is caught in the heart-shaped recess 51b of the heart island 51, as shown in FIG.
Due to the restoring force of the spring 40, the recess 51b receives the force for pushing the sliding body 30 back.

Therefore, as shown in FIG. 7, the sliding body 30 is retracted into the fixed cylinder 20 while the strike 90 is bitten between the lower surface of the main body 31 and the upper surface of the holding portion 32. Stationary in position.

Next, in order to release the strike 90, the sliding body 30 may be pushed in again by the strike 90.

When the sliding body 30 is pushed in by the strike 90, the sliding body 30 retracts in the fixed cylinder 20, and along with the displacement of the cam groove 50 on the upper surface of the sliding body 30, the sliding body 30 stops at the stop portion 55 of the cam groove 50. The tip of the lock lever 60 that was used to
Continue to 56.

That is, since the bottom of the terminal end portion 54 is shallower than the stop portion 55, the tip end portion of the lock lever 60 cannot return to the terminal end portion 54 due to the step of the bottom, and the escape portion 56 deeper than the stop portion 55 is formed. move on.

When the tip of the lock lever 60 advances to the escape section 56,
Since 56 is a dead end, hit the tip of it,
The sliding body 30 cannot be pushed any further. This position is a position slightly beyond the retracted position of the sliding body 30.

When the force pushing the strike 90 is released, the sliding body 30 is pushed back by the restoring force of the spring accumulated in the spring 40. By the forward movement of the sliding body 30 at that time,
The tip portion of the lock lever 60 moves backward in the escape portion 56.

The forward end of the lock lever 60 that has moved backward advances to the return route 57 along the other side of the Heart Island 51.

That is, since the bottom of the stop portion 55 is shallower than the escape portion 56, the tip end portion of the lock lever 60 cannot return to the stop portion 55 and moves along the return path 57 due to the step of the bottom.

Then, the front end of the lock lever 60 that has proceeded to the return path 57 returns from the shallowest end 57 'to the starting end 52, and since the starting end 52 is a dead end, as shown in FIG. Hit against. Therefore, the restoring force of the spring 40 is
The slide body 30 is stopped at the forward end position slightly protruding from the opening front surface 21 of the fixed barrel 20.

In this forward position, as shown in FIG.
The holding portion 32 of the sliding body 30 that has been biting open due to its elastic restoring force opens while hanging down obliquely downward from the lower edge of the opening front surface 21 of the fixed barrel 20, and the locking claw 33 thereof engages the engaging claw of the strike 90. When it is disengaged from 91, the space between the upper surface and the lower surface of the main body 31 is opened, and the strike 90 biting between the both surfaces is released.

At this time, as shown in FIG. 3, the strike 90 is pushed back by the forward facing front surface of the guide frame 34 of the sliding body 30 which is advanced by the restoring force of the spring 40, which is the reason why this is called a floating latch.

Next, the switch mechanism will be described.

As shown in FIG. 1, this switch mechanism includes three fixed contacts 110 to 130 and three fixed contacts 110, which are insulated from each other and are provided in a fixed cylinder 20 along a sliding surface with a sliding body 30. ~ 130
Of these, a common contact portion 141 that is always conductive to one common fixed contact 110, and a sliding body that is conductive to this common contact portion 141
In the two positions of the forward position and the backward position of 30, the remaining two first and second switching fixed contacts 120 and 130 are selectively conducted.
The movable contact 140 includes the first and second switching contact portions 142 and 143.

First, the three fixed contacts 110 to 130 on the fixed cylinder 20 side will be described. One of the common fixed contacts 110 is integrated with the sliding body 30 at least in two positions, that is, the forward moving position and the backward moving position of the sliding body 30. It is electrically connected to the common contact portion 141 of the moving movable contact 140, and extends in a rearward direction from the open end of the fixed barrel 20 along the right inner side surface of the fixed barrel 20 located on the front side in FIG. The rear end portion thereof becomes thin and penetrates the rear wall 22 of the fixed cylinder 20 and projects to the outside.

The first switching fixed contact 120 is electrically connected to the first switching contact portion 142 of the movable contact 140 of the sliding body 30 at the forward position of the sliding body 30, and faces the above-mentioned common fixed contact 110 in the lateral direction. In FIG. 1, along the left inner side surface of the fixed cylinder 20 located on the far side, the opening end of the fixed cylinder 20 extends rearward for a long time,
The rear end portion thereof becomes thin and penetrates the rear wall 22 of the fixed cylinder 20 and projects to the outside.

The second switching fixed contact 130 conducts to the second switching contact portion 143 of the movable contact 140 of the sliding body 30 at the retracted position of the sliding body 30, and is on the same side as the common fixed contact 110 described above and downward. It is located a little away from the fixed cylinder 20, along the left inner surface of the fixed cylinder 20, and extends relatively shortly rearward from the center in the longitudinal direction of the front and rear of the fixed cylinder 20. Penetrate and project outside.

More specifically, the three fixed contacts 110 to 130 are stamped and formed from a metal plate having high conductivity.

First, the common fixed contact 110 is located along the inner surface of the fixed cylinder 20,
A wide contact portion 111 having a length substantially equal to the depth of the fixed barrel 20 and a slender elongated portion extending from the rear end of the contact portion 111.
20 and a terminal portion 112 protruding outside. Then, the tip of the contact portion 111 is bent into an L-shape to form a bent portion 113, and the rear wall 2 of the fixed barrel 20 is formed between the terminal portion 112 and the terminal portion 112.
A constricted portion 114 having a width approximately equal to the wall thickness of 2 and confined in a U shape from below is formed.

The first switching fixed contact 120 has a length substantially the same as that of the common fixed contact 110, and is a wide contact extending along the inner surface of the fixed cylinder 20 and having a length of about half the depth of the fixed cylinder 20. Part 121
An extension portion 122 extending rearward from the lower half of the contact portion 121 and reaching the rear wall 22 of the fixed barrel 20; and a terminal that extends slenderly from the rear end of the extension portion 122 and projects to the outside of the fixed barrel 20. And a part 123. A tongue-shaped bent portion 124 that is bent in a short L-shape is formed at the tip of the contact portion 121, and a rear wall of the fixed cylinder 20 is provided between the extension portion 122 and the terminal portion 123. A constricted portion 125 having a width approximately equal to the wall thickness of 22 and confined in a U shape from above and below is formed.

The second switching fixed contact 130 extends along the inner surface of the fixed barrel 20 and has a wide contact portion 131 having a length of about half the depth of the fixed barrel 20, and a slender extension from the rear end of the contact portion 131. And a terminal portion 132 protruding outside the fixed barrel 20. Then, a tongue-shaped bent portion 133 that is bent in a short L-shape is formed at the tip of the contact portion 131, and the thickness of the rear wall 22 of the fixed cylinder 20 is formed between the terminal portion 132. A constricted portion 134 having a substantially equal width and confined in a U shape from above and below is formed.

On the other hand, the fixed cylinder 20 has an L-shaped cross section into which the bent portion 113 of the common fixed contact 110 and the bent portion 124 of the first switching fixed contact 120 are inserted on both sides of the open end thereof. Grooves 150 and 151 are formed, respectively, and a slit 152 is formed in the center of the front and rear lengths of the fixed cylinder 20 into which the bent portion 133 of the second switching fixed contact 130 is inserted. Also, on the rear wall 22 of the fixed cylinder 20,
As shown in FIG. 4, through holes 153 to 155, which penetrate the front and rear, through which the respective terminal portions 112, 123 and 132 of the three fixed contacts 110 to 130 are passed.
To open.

A procedure for attaching the three fixed contacts 110 to 130 to the fixed cylinder 20 will be described.

First, the terminal portion 112 of the common fixed contact 110 is inserted from the open front surface 21 of the fixed barrel 20 into the hollow interior, and is passed through the through hole 153 of the rear wall 22 to the outside. Insert according to the slot 150. Then, the terminal portion 112 that has come out through the through hole 153 is twisted so that it does not come off from the through hole 153.

Similarly, the first switching fixed contact 120 has its terminal portion 122
The fixed tube 20 is passed through the through hole 154 of the rear wall 22 and is exposed to the outside, and the bent portion 124 is inserted in accordance with the insertion groove 151 of the fixed tube 20, and finally the terminal portion 122 that comes out of the through hole 154 is twisted. The through hole
Keep it from 154.

Further, the second switching fixed contact 130 similarly has its terminal portion 132.
Through the through hole 155 of the rear wall 22 of the fixed barrel 20,
The bent portion 133 is inserted in accordance with the slit 152 of the fixed cylinder 20, and the terminal portion 132 that finally comes out from the through hole 155 is twisted so that the bent portion 133 is prevented from coming off from the through hole 155.

Next, as shown in FIG. 1, the movable contact 140 on the side of the sliding body 30 has a generally U-shape as a whole, and is punched from a metal plate having a high conductivity like the fixed contacts 110 to 130.

First, the common contact portion 141 of the movable contact 140 is formed by curving the free end portion on the same side as the above-mentioned common fixed contact 110, that is, the free end portion on the front side in FIG.

The first switching contact portion 142 opposes the common contact portion 141 in the width direction, and has a free end portion on the same side as the first switching fixed contact 120, that is, the opposite free end portion located on the back side in FIG. It is formed by curving in an arc shape.

The second switching contact portion 143 is located below the common contact portion 141 and is separated therefrom, and the free end portion on the same side as the common contact portion 141 is branched downward from the middle of the length, and the branched side is formed. Like the common contact portion 141, the tip of the piece is formed by curving outward in an arc shape.

Therefore, the three contact portions 141 to 143 are formed of a common metal plate and are electrically connected to each other.

Next, the mounting structure of the movable contact 140 described above will be described. On the upper surface of the main body 31 of the sliding body 30, as shown in FIG. 5, a pair of left and right projecting edges 160, 161 are formed along the left and right edges thereof. At the same time, a pressing piece 162 is formed at the center of the front edge, and a pair of columnar left and right columns 163, 164 are formed on both sides of the pressing piece 162, respectively. Further, U-shaped notches 165 and 166 into which the contact portions 141 to 143 of the movable contact 140 are respectively fitted are formed on the respective projecting edges 160 and 161, respectively. The columns 163 and 164 are spaced inwardly from the inner surfaces of the adjacent projecting edges 160 and 161 by an interval approximately equal to the thickness of the movable contact 140, and the plate of the movable contact 140 is also separated from the rear surface of the pressing piece 162. The rear surfaces are spaced apart by a distance approximately equal to the thickness, and the inner surfaces of the projecting edges 160 and 161, the rear surfaces of the pressing pieces 162, and the outer peripheries of the columns 163 and 164 form a U-shaped frame portion that holds the movable contact 140.

That is, as shown in FIG. 2, the movable contact 140 is fitted in the frame-shaped portion in a state of being slightly bent, so that the movable contact 140 causes the movable contact 140 to have inner surfaces of both the projecting edges 160 and 161 of the sliding body 30 and the pressing piece 162.
It does not come off from the U-shaped frame portion formed by the rear surface and the outer circumferences of the columns 163 and 164.

Next, the switch operation will be described in relation to the movement of the latch 10 with reference to FIGS.

First, in the unlocked state of the latch 10, as shown in FIGS. 2 and 3, the sliding body 30 is at the forward position slightly protruding from the opening front surface 21 of the fixed barrel 20, and the contact portion 121 of the first switching fixed contact 120. Is
It is located in the front half of the fixed barrel 20 on the front side 21 of the opening.

Therefore, as shown in FIG.
The common contact part 141 of 0 is the common fixed contact 11 in the fixed cylinder 20.
While contacting the contact part 111 of 0, the first switching contact part 142 of the movable contact 140 contacts the contact part 121 of the first switching fixed contact 120, and the common fixed contact 110 and the first switching via the movable contact 140. The fixed contacts 120 are electrically connected to each other.

At this time, the contact portion 131 of the second switching fixed contact 130 is the fixed cylinder.
Since it is located in the rear half of the back side of 20, the second switching fixed contact 130 does not contact the second switching contact 143 of the movable contact 140.
Is in a non-conducting state.

On the other hand, in the locked state of the latch 10, the sliding body 30 is in the retracted position stored in the fixed barrel 20, as shown in FIGS.

Therefore, as shown in FIG. 9, since the common contact portion 141 of the common fixed contact 110 in the fixed cylinder 20 is located at the entire length in the depth direction of the fixed cylinder 20, the common contact portion of the movable contact 140 of the sliding body 30. 141
Maintain contact with. When the sliding body 30 moves backward,
Since the contact part 121 of the first switching fixed contact 120 is cut off in the middle of the process, both of them switch from the contact state to the non-contact state, and this time, the second switching contact part 143 and the second switching fixed contact 130. The contact point 131 comes into contact.

Therefore, the common fixed contact 110 and the second switching fixed contact 130 are electrically connected to each other via the movable contact 140, and at this time, the first switching fixed contact 120 is in a non-conductive state.

As can be seen from the above description, the switch mechanism of the latch 10 is equivalent to a single pole double throw switch in terms of a switch.

Next, a specific example of use of the latch 10 will be described with reference to the circuit diagram shown in FIG.

In the figure, 170 is a switch corresponding to the main latch 10, a is a contact corresponding to the common fixed contact 110, b is a contact corresponding to the first switching fixed contact 120, and c is a second switching fixed contact 1.
The contacts corresponding to 30 are shown respectively. Reference numerals 180 and 181 denote first and second light emitting sources such as lamps, and 190 denotes a DC power source 190 for them.

Then, the first light emitting source 180 and the power source 190 are connected in series to the contacts a and b of the switch 170. The second light source
181 is connected in series between the power source 190 and the contact point c of the switch 170, that is, in parallel to the circuit including the first light emitting source 180 and the power source 190.

Next, the operation of the circuit described above will be explained. In the unlocked state of the latch 10, as shown by the solid line in FIG.
When the contacts a and b of 170 are conducted, the first light source 180 is turned on. At this time, the contacts a and c of the switch 170 are in a non-conductive state, and the second light source 181 is off.

On the other hand, in the locked state of the latch 10, as shown by the dotted line in FIG. 10, the switch 170 is switched and the contacts a and c are brought into conduction, so that the second light source 181 is turned on and the first light source 181 is turned on. Light source 1
80 goes off.

Therefore, using the latch 10, two light sources 180, 18
1 switching operation can be performed.

FIGS. 11 and 12 show a concrete example using two latches. FIG. 11 is a perspective view of this device, and FIG. 12 is a circuit diagram thereof.

First, the present device will be described with reference to FIG. 11. The present device is mounted on a center console of an automobile for use, although not shown.

In the figure, 200 is a hollow box-shaped housing to be embedded in the center console, 210 is a slide type ashtray stored in the hollow inside of the housing 200, 220 is located below the ashtray 210, and the housing 200 is the same as the ashtray 210. The reference numeral 230 denotes a slide type map lamp housed in the hollow inside, and the reference numeral 230 denotes a backlight type display portion arranged next to the map lamp 220.

The ashtray 210 is constantly urged by the urging means (not shown) in the protruding direction as shown by the alternate long and short dash line in FIG. 11, and the urging force is increased by the urging force as shown by the solid line in FIG. On the contrary, although not shown, using the latch 10 and the strike 90,
It can be locked in the storage position inside the housing 200. Also, ashtray 2
Although not shown in FIG.
Is provided with a light emitting source 211 such as a lamp for illuminating the inside thereof.

Further, although not shown in FIG. 11, the map lamp 220 has a light emitting source 221 such as a lamp built therein and a lower half portion thereof becomes a light transmitting surface. And map lamp
Like the ashtray 210, the 220 is always urged in the protruding direction by the urging means (not shown) as shown by the one-dot chain line in FIG. 11, and as shown by the solid line in FIG. Although not shown, the latch 10 and the strike 90 can be used to lock the housing 200 in the retracted position against the biasing force.

Further, the display section 230 is illuminated from the back by a light emitting source 231 such as a lamp arranged in the housing 200 so that, for example, characters and figures are illuminated.

Next, referring to FIG. 12, the three light emitting sources 211 and 22 described above are used.
The connection state of 1,231 will be described.

In the figure, 212 indicates a switch corresponding to the latch 10 used for the ashtray 210, 222 indicates a switch corresponding to the latch 10 used for the map lamp 220, and each a is a common fixed contact 110.
, B is a contact corresponding to the first switching fixed contact 120, and c is a contact corresponding to the second switching fixed contact 130.

First, the light emission source 211 of the ashtray 210 and its power supply 240 are connected in series to the contacts a and c of the ashtray switch 212.

Further, the light source 221 of the map lamp 220 is the power source 240 described above.
And a contact point c of the map lamp switch 222,
That is, the circuit including the light emission source 211 of the ashtray 210 and the power supply 240 thereof is connected in parallel.

Further, the light emission source 231 of the display unit 230 has a contact point b of the ashtray switch 212 and a contact point b of the map lamp switch 222.
In series, that is, a circuit including the light source 211 of the ashtray 210 and its power supply 240, and the light source 221 of the map lamp 220.
Are connected in parallel to the circuits including.

Next, to explain the operation of the above circuit, the ashtray 210 and the map lamp 220, as shown by the solid line in FIG. As shown by the solid line in FIG. 12, the contacts a and b are in a conductive state, and the light emitting source 231 of the display unit 230 is on. At this time, since the contacts a and c of both switches 212 and 222 are both non-conductive, the light emitting source 211 of the ashtray 210 and the light emitting source 221 of the map lamp 220 are turned off.

Now push the front of the ashtray 210 a little bit and the latch 1
When 0 is unlocked, the ashtray 210 is a biasing means (not shown).
Due to the urging force of (3), as shown by the alternate long and short dash line in FIG. 11, it projects toward the front side and becomes ready for use. At this time, the ashtray switch 212 is switched as shown by the dotted line in FIG. 12, and the contacts a and c are brought into conduction, so that the light emission source 211 of the ashtray 210 is turned on.

On the other hand, at this time, the contacts a and b of the ashtray switch 212 are brought out of conduction, so that the light emission source 2 of the display unit 230 is
31 goes out.

Further, when the front surface of the map lamp 220 is pushed in a little, the latch 10 is unlocked, and the map lamp 220 is moved by the urging force of the urging means (not shown), as shown by the one-dot chain line in FIG. And project to the front side. At this time, the map lamp switch 222 is switched as shown by the dotted line in FIG. 12, and the contacts a and c are brought into conduction, so that the light emitting source 221 of the map lamp 220 is turned on.

Even when the ashtray 210 is in the storage position and only the map lamp 220 is projected, the light source 231 of the display unit 230 is turned off, and the display is displayed only when the ashtray 210 and the map lamp 220 are both stored. The light source 231 of the section 230 is adapted to be turned on.

On the other hand, in the embodiment shown in the drawings, the latch 10 that uses the heart-shaped cam groove 50 has been described, but the invention is not limited to the one that uses the cam groove 50, and it may operate as a similar embossing latch. Good. For example, as the conventional example,
A rotating cam may be used like a latch described in the specification and drawings attached to the application of Japanese Patent Application No. 1-150554.

Further, the structure of the holding portion 32 of the sliding body 30 of the latch 10 and the strike 90 are not limited to those of the embodiment shown in the drawings.
It suffices if the 10 and the strike 90 can be disengaged from each other, and for example, a structure as described in the specification and drawings attached to the application of the above-mentioned Japanese Patent Application No. 1-150554 may be adopted, and further magnetic force can be applied. You may use it.

[Effects of the Invention] As described above, according to the present invention, it is possible to provide a latch with a switch capable of performing a circuit switching operation.

[Brief description of drawings]

1 shows an embodiment of the present invention, FIG. 1 is an exploded perspective view, FIGS. 2 and 3 show an unlocked state of an assembled latch, and FIG. 2 is a plan view of a latch and a strike. Fig. 3 is a longitudinal sectional view showing a state in which the above strike is brought into contact with the latch, Fig. 4 is a rear view of a fixed cylinder of the latch, Fig. 5 is a plan view of a sliding body of the latch, and Figs. FIG. 6 shows a locked state of the latch, FIG. 6 is a plan view of the latch and strike, FIG. 7 is a longitudinal sectional view of the same, and FIGS. 8 and 9 show a positional relationship between the fixed contact and the movable contact. FIG. 8 is an explanatory view of the latch in the unlocked state, FIG. 9 is an explanatory view of the latch in the locked state, and FIG. 10 is a circuit diagram showing a concrete example of using the latch,
FIG. 2 shows another example of the use of the latch, FIG. 11 is a perspective view of the device, and FIG. 12 is a circuit diagram thereof. 10 ... Latch, 20 ... Fixed tube, 30 ... Sliding body, 40 ... Coil spring as spring means, 90 ... Strike, 110 ...
… Common fixed contact, 120 …… first switching fixed contact, 130 …… second switching fixed contact, 140 …… moving contact, 141 …… common contact part, 142,143 …… switching contact part.

Claims (1)

[Scope of utility model registration request] 1. A fixed barrel and a strike slidably held in the fixed barrel and positioned opposite to the fixed barrel when the strike is pushed into the fixed barrel against the urging force of a spring means. In the bite state, it is locked in the retracted position in the fixed barrel against the biasing force of the spring means, and when the strike is further pushed in against the biasing force of the spring means in the fixed barrel, the lock is applied. In a latch provided with a sliding body that is released from the state and is advanced by the urging force of the spring means to release a strike, in the fixed cylinder, three mutually insulated along the sliding surface with the sliding body. A fixed contact is provided, and the sliding body has a common contact portion that is always connected to one of the three fixed contacts, and a forward and backward position of the sliding body that is connected to the common contact portion. At Two switches with a latch, characterized in that a movable contact and a switching contact unit for alternatively conducting the fixed contact remains.